Apparatus for assembling heel-lifts and rands



Aug. l, 1933. J. B. HADAWAY 1,920,256

APPARATUS FOR ASSEMBLING HEEL LIFTS AND HANDS Filed Dec. 15. 1950 2 Sheets-Sheet l Aug. l, 1933.

J. B. HADAWAY 1,920,256

APPARATUS FOR ASSEMBLING HEEL LIFTS AND RANDS Filed Dec.

2 Sheets-Sheet 2 Patented Aug. 1, 1933 APPARATUS FOR ASSEMBLING HEEL-LITS Y AND BANDS John B. Hadaway, Swamps'cott, Mass., assignor to United Shoe Machinery Corporation, Pateri son, N. J., a Corporation of New Jersey ApplicationDecember', 1930. Serial No. 502,400

23 Claims. (Cl. 12-67.1)

rlhis invention relates to apparatus by which such portions of shoeeheels as lifts and rands may be secured to each other, as by forcing together surfaces o1" these elements to which ad- 5 hesive coatings have been applied.

A convenient manner of attaching to heelliits or bases the rands which are-to ,iill' the peripheral spaces between the plane ylicei-surfaces and the curvedheelseats is by means of an' interposed adhesive.

for this purpose, since the surfaces to be opposed may be coated, allowed to`become sufciently dryy to be handled, and then the Yattachment accomplished Vby pressure upon the pieces associated with their coated surfaces in contact,4 This is as disclosed in Letters Patent of the United States No. l,779,368,-Cavanagh, October 2l, i930. An objectof my invention is to provide for the vassembling of the previously coated heel-portions by means simple in structure and rapid and eiiicient in action. This object I attain by combining a roll having a conical lift-engaging surface and a roll having a conical rand-engaging surface, these rolls being rotated and having associated with 'them a liftand randgage, from which gage the rolls decrease in diameter outwardly; Means, as a spring variable as to force, is illustrated for urging one of the rolls yieldably toward 'the other. The conical rolls will not only act, because oi 'the gradually increasing speeds of rotation oftheir peripheries considered 'longitudinally of their axes, to turn a lift and associated rand, but also, by properly proportioning the rolls to the curvature of the lift, the slant-heights ofthe conical surfaces from the bases to the'apices of the complete cones being less than the radius oi curvature of said iiit, the work may be held against the with little or no effort on the part of Vthe 40 operator. This action may be augmented by.. an arrangement of the work-engaging surface oi one of the rolls, preferably that which acts upon the lifts. This roll-surface is shown as provided with' projections inclined rearwardly, with respect to the direction of rotation, from the portion of the roll of smaller diameter toward the larger portion or base.

to the work. both a feeding or advancing force exerted circumierentiallyoi" the roll anda force in the direction of the gage. In the present embodiment ofthe invention, the projections are formed between inclined grooves and are intersected by circumferential grooves which tend to prevent the heel-portion from slipping outward- `ly irom Athe gage. I prefer to have therolls so Latex is especially suitable These projections apply.

related that, at ktheir lines of contact with the work, they diverge in the same direction as do the opposite surfaces of the lift and rand, the latter being beveled. This angle, however, is best less than that between the opposite work-surfaces, thus producing a greater pressure at the exterior of the heel and insuring perfect contact between the lift and rand where it is most essential. The gage, which may be variable in position, has, as herein disclosed, independent liftand randcontact-surfaces lying in diierent planes, the rand-contact-surface being farther from the center oi `the lift. The rand is thereby caused to project Vbeyond the lift with. which it is assembled, insuringthe proper relation of the rand for the succeeding step of compressing the fheel. Y'I guardY against tendency of the assembled elements to assume a dished form, or one generally outwardly curved at the outer surface of the lift, by making the Work-engaging portion of maximum diameter of one of the rolls, pref- Veraoly that contacting with the rand, greater thanthe corresponding portion of the. associated or lift-contacting roll and being farther-removed from the center of theV lift. By so doing, particularlyk when lgreater pressure is applied to theY outer portion of the work by the roll-surfaces. diverging at a less angle than the opposite Worksurfaces which they engage, the periphery of the lift is bent in a direction neutralizing the previously mentioned distortion. Herein, the yieldable Aroll is shown as rotatable in apivoted arm, thek work-gage .beingV movable with said arm. Therefore, to prevent variation inthe spacing ofthe .work-contacting surfaces of the gage from the associatedroll, said surface is preferably curved about the. pivotal axis of the arm.

The accompanying drawingsillustrate a particular embodimen't'of the invention and a modiiication thereofinpone respect,

Fig. 1v being 'a broken side elevation of my improved assembling apparatus;

Fig. 2, a detail inside elevation showing the relation of the assembling rolls to each other and to the work;

Fig. 3, a similar view Aof another arrangement of the rolls and including associated elements;

Fig. 4, an end elevation looking `from the left of Fig.'1; Y

Fig. 5, an enlarged `rview taken in xthesame direction as Fig. 4 but includingonly the lower roll and more closely associatedparts;

Fig. 6, la` plan view `of lsaid lower roll ,and

Fig. 7, a perspective view of a liftand rand assembled byithe apparatus. '110- In the upper portion of a frame 10, adapted, as illustrated, to be supported upon a bench, is

journaled a horizontal shaft 12 rotated from a main driving shaft V14 by spur-gearing 16. At its forward extremity, the shaft l2 acts through bevel-gearing 18 to `rotate in the frame a downwardly and outwardly inclined shaft 20 having secured toits lower end a roll 22. This roll is conical in form, decreasing gradually in diameter outwardly, but preferably with its reduced portion omitted, being, therefore, frustoconical. The roll 22 is one of a pair of workfeeding and pressure-rolls, the companion. roll 24 `of the pair being also frusto-conical, with its 15 smaller end outward and being fast on the upper extremity of an upwardly and outwardly inclined shaft 26 journaled in a bracket 28. The apex of the conical surface of the roll -24 preferably lies in proximity to that of the roll 22, and it is rotated through bevel-gearing 30 from aV shaft 32 turning-inap. arm 34 pivoted at 36 upon the frame anduponwhich the bracketY 28 is mounted. A chain ofspur-gears 38 connects the shaft 32 to the shaft 12. The driving connections and l diameters of the conical surfaces are such that opposite points jupon the latter travel at lap-V proximately the same speed. The roll 22, being fixed against bodily movement, acts as an abutment-roll, while the lower work-supporting roll 24 may be yieldable by virtue of movement of its arm34. This yield is, in the present instance, against the resistance of a spring 40 interposed between a depending portion 42 of the arm 34 and a screw 44 threaded horizontally into the 3mframe. The spring surrounds and is retained against lateralY dispiacement by a rod 46 pivoted to the `arm-portion 42 and guided in a bore in the screw, Said screw is adjustable in position, to allow the expansive force of the springto be wivariediby a hand-wheel 48. The normal space between the work-engaging surfaces of the rolls 22 and 24 may be altered by' an adjustable stopscrew 56 mounted for vertical movement inthe.

frame and against which the spring 40 urges the T arm 34. As illustrated, the screw 50 is threaded into a bushing Y 52 in the frame and maybe turned by a hand-wheel54 splined upon thejupper endV of the shaft and with its notched under side normally held by a spring 56- against a re- 5 v"taining projection 58 upon the frame.

At the inner side of the rolls 22 land 24 is a work-gage 66 carried by a bracket 62 joined to the frame 10 by a slot-and-screw connection 64, permittingv the gageto be positioned at different 3' distances from the rolls and'thus determine their engagement with the work. For the operation` of the apparatus upon heel-lifts H and rands R, the gage is providedwith a lift-contact-surface 66 and arand-contact-surface k68; and, since it s lis convenient for the operator to present these heel-portions to the rolls with the lift down, the mst-mentioned gage-surface isv below the companion surface. Both surfaces are appropriately inclined to receive the engagement of the -0uter edges of the associated lift and'rand as they are presented to the rolls, and preferably lie in different planes, the surface 68 being outsidev the surface 66 or farther removed from the rolls. It is advantageous to have the gage-sur- 70 face 68 curved about a center lying atV the pivotal axis of the arm 34. lThiscauses thedistance between thissurface and the roll 22 to remain the same, whateverthe angle of the arm. The gage- 'arrangement allows the rand, after assembly, to project beyond the lift. This is important',be

cause the surfaces of a rand are so related that when it is applied to a lift the lower edge of the rand will project beyond the upper; see Figs. 2 and 3. The arrangement of the gage-surfaces will cause the upper edge of the rand to lie far enough out to insure it coming in the nished surface of the heel, `without leaving an unsightly depression. The projecting lower edge is removed in the trimming of the heel. There is shown, mounted upon the bracket 62 with the gage 60, a guard consisting of opposite sections IO and 72 secured, respectively, to the front and rear sidesof the bracket by slot-and-screw connections 74. Each section has a curved arm 76 embracing a portion of the roll 24 and its bevelgear 30,and a depending arm '78 partially surrounding the associated bevel-gear. The guard prevents contact of the operators hands with the lower roll and its gearing. Its variable attachment to the bracket 62 enables the guard to be positioned correctly with respect to the elements which it surrounds, regardless ofthe adjustmentiof the bracket at 64.

For assembling `a heel-lift and a rand by the pressure of the rolls 22 and'24 upon them with 100 the `Vlift below the rand, I prefer to so mount the roll 24 that the upper portion of its conical workengaging surface, along a line directly opposed by an element of the upper roll, is approximately horizontal. This gives a surface located similarly to the customary work-supporting table,V and one `over vwhich the operator may readily introduce the plane lower face of a lift. The corresponding portion of the conical surface of the upper roll is best so held by its mounting that it diverges from its companion toward the gage 60 or from ,the end of smaller` to that of greater diameter, approximately corresponding in inlos vclination` to the angie between the upper surface of the beveled rand and the lower surface of the associated lift. As may best beseen in Fig. 3, this coincidence ofinclination is not exact. It is important that the adhesion of the rand and lift shall be most perfect at the outside of the heel, where the joint will be visible in the finished work. Consequently, in the illustrated embodiment of the invention, the angle between the opposite elements of the conical surfaces, or at the bite of the rolls, is somewhat less than between the outer surfaces of the rand and lift. This results in greater pressure upon the work towardthe periphery and the desired firm adhesion. It also, bythe maximum separation between the inner portions of the conical surfaces, gives a space sufficient to receive the thin edge of the rand'as it crimps in bending. On the other hand, these inner surfaces are close enough together to retain the crimped edge from'projectirig beyond the plane of the thick edge of the rand.

Under certain conditions, when thin lifts are being operated upon, as when the operator, by pressure upon the lifts during their presentation to the apparatus, distorts them, the assembled parts may become convex, the lift being dished outwardly. The lift tends to be held in this form by the applied rand,V and it becomes impossibleto perfect the shape of thenishedheel by its con pression. `This I overcome vby the arrangement of rolls particularly illustrated in Fig. 2 of the drawings. Here the rolls 22 and 24 are of different diameters at their bases, the outer edge of the roll 22 projecting beyond its companion. It thus lies farther fromY the center of the lift being operated upon, extending beyond the plane of 1 0 Uly the 'gage-surface 66 close'to 'the surface. 68.' This,

eartiwlarly with thek greater presu-f@ exerted. br the rolls'at the outside of the rand, as Ijust indicated, tends to bend the projecting edge of the rand over the lift, setting up, when the parts arer the roll-surfaces are substantially the same length along the body, being satisfactory forthicker lifts. In fact, the pressure upon the edge of the rand, protruding beyond the lift, forces this edge below the upper Isurface of said lift, and produces, to some extent, the same compensating effect.

The conicalform of the rolls is caused to relieve the operator of almost all effort in holding the work against the gage 60. Since the work-engaging surfaces ofthe rolls rotate at progressively greater speeds from the inner portions toward the outer, vbecause of the gradual-,increase in di- .ameten the work will move in a curved path, the

center of which is toward the center of the lift and rand. By employing, as is shown herein, rolls' the slanteheights of the conical surfaces of which have a less length between the apices and bases than the radii of curvature of the lifts and rands` Athe work isv urged against the gage and there held as it advances, and, as opposite points at the bite of therroll's are moving at substantially the same speed, there is no tendency to displace the workc `pieces by slipping one over the other.- Rands ordinarily come to the apparatus either practically straight from end to end or partly formed to the horseshoe-shape which they must assume when assembled with heel-lifts. In their'unconnected condition, as a rand is pressed against a lift by 'the rolls 22 and 24, the resilience of the rand asv it ycontacts withV the gage-surface 68 exerts a force tending to separate the associated lift from the gage-surface 66. To assist the conical rolls to V`overcome this,l the lift-engaging surface of the roll 24 has formed in it -a circumferential series of 'projections 80 between grooves 82. These projections may be of the same form and' extend in a regular series Yabout the roll between its ends. .Because of the progressive difference in the circumferences of the roll-surface,1both the projections and grooves are tapered longitudinally from the portionof smaller to that of greater diameter.

Each projection, instead of coinciding indirec-v tion with an element ofthe conical surface,` is

inclined toward the base of the roll rearwardly with respect to its rotation. Asa result of this inclination, the force applied to a lift at any point along a projection may be considered as includ-` ing a component acting circumferentiallylto"feed and rotate the engaged lift and a force.l exerted radially with relation to the work, theeffect of which is to press the edge of the lift against the gage-surface 66. Tliecontinued engagement between the lift and gage 'is thus vperfectly maintained. As anY additional guard against the outward displacement of the lift, `a series of circularT grooves 84 may be'forrned about the work-engaging surface of the roll 24. This divideseach of LVthe projections into` a seriesl of projections lying between the ends of the roll andresisting movementV of the lift. I have'shown the randengaging'surface of the roll 22A as provided with a circumferential series of projections "86 substantially coinciding with the elements lof the conical surface; These act upon the 'rand` fectivelyfeed it forward.` v Y f In 4using the apparatus of this invention, the operator takes a lift H and a rand R having a coating of some such adhesive as latex upon their faces which are to be secured together, places them in the properrelation at the breast-'corner a of the lift (Fig. 7) and introduces them over the horizontalfsurface of the lift-engaging Yroll 24, the outer edges of the lift and rand contact-v ing, respectivelmwith the -gagefsurfaces 66 and 68. n'doing this, theV arni 34 is pressed down against its spring e0. TheA operator then permits the spring to force the roll 24 against the lift, and therefore the rand against the engaging the roll 22, extending at its base-portion beyondr the companionroll, so forces said rand outward and downward over the lift that convexity of the outer sufaceof the latterl is prevented. Travel of the work continues until the breast-corner b is reached, when it is ejected from the rolls, the uniting of thelift and rand being completed.

Having described my invention, what claim as new and desire to secure by Letters Patent of the United States is: i Y

1. An apparatus forassembling heel-lifts and rands comprising a rotatable roll having a conical lift-engaging surface, a co-operating rotatable roll .having a conical rand-engaging surface, means for rotating the rolls and a liftand rand gage associated with ther-oils, both of said rolls decreasing in diameter outwardly from the gage.

v 2. Anapparatus for assembling heel-lifts and rands comprising a rotatable roll having a conical liftmengaging surface, a ccoperating rotatable roll having a `conical rand-engaging surface, means vfor rotating` the rolls in opposite directions, opposite work-contacting points of the two rolls traveling at substantially the saine speed, anda liftand rand-gage associated with the rolls. Y Y

3. An apparatus for-'assembling heel-lifts and rands comprising a gage, rotatable rolls receiving the work between them, and means for ro tating the'rolls, said rolls being constructed and arranged to urge against the gage both the lift and rand `being operated upon.

and rand-gage associated with said rolls.

5. Anapparatus for assembling heel-liftsandrands comprising a rotatable roll having aconca'lliftfengaging surface, a co-ope'rating rotating roll-having a conical rand-engaging surface, vthe line of contact between the liftengaging roll and-aV lift being approximately horizontal and the line of contactbetween therand-engagingroll and a rand :being inclinedto the horizontal,

means for rotatingthe rolls in oppositedirections, and a liftand rand-gage associated with the rolls, both of said rolls decreasing in diameter outwardly from the gage. Y

A 6. An apparatus forassembling heel-lifts and beveled rands comprising a rotatable roll having a conical lift-engaging surface,ra co-operating rotatable roll having a conical rand-engaging surface, the rollsat their lines of contact with the work diverging in the direction of the periphery of the lift, and means for rotating the rolls.

7. An apparatus for assembling heel-lifts and beveled rands comprising a rotatable roll having a conical lift-engaging surface, a cooperating rotatable roll having a conical vrand-engaging surface, the rolls at their lines of contact with the work diverging in the samedirection as do the opposite surfaces of the lift and rand but at a less angle, and means for rotating the rolls in opposite directions. Y I

8. An apparatus for assembling heel-lifts and rands comprising a rotatable roll having a conical lift-engaging surface, a co-operating rotatable 'lift-engaging surface, a co-operating rotatable roll having a conical rand-engaging surface, means for rotating the rolls, and a liftand randgage associated with said rolls, the work-engaging portion of maximum diameter of one of the Virolls being greater than the corresponding portion of the associated roll and both of said maximum portions being at the ends toward the gage.

10. .An apparatus for assembling heel-lifts and rands comprising a rotatable roll having a conilcal lift-engaging surface, a co-operating-rotatable roll having a conical rand-engaging surface, means for rotating the rolls, a gage associated with said rolls and provided with liftand randcontact-surfaces lying in. different planes, and

means arranged to vary the position of the gage toward and from the rolls.

11. An apparatus for assembling heel-lifts and rands comprising a rotatable roll having a conlcal lift-engaging surface, a co-operating rotatable roll having a conical rand-engaging surface,

means for rotating the rolls in opposite directions, and a gage associated with said rolls and provided with liftand rand-contactesurfaces lying in different planes, the rand-contact-surf face of the gage being farther from the center of the lift thanis the lift-contactsurface- 12. An apparatus for assembling heel-liftsand randscomprising a rotatable roll having a conical `lifteengaging surface, a co-operating rotatable roll having a conical rand-engaging surface,

means Yfor rotating the rolls in opposite directions, and a lift* and rand-gage` associated with said rolls, the Work-engagingrportion of maximum diameter of the rand-roll being greater than the corresponding portion of the lift-roll.

13. An apparatus for assembling heel-lifts and rands comprising a rotatable roll having a conical lift-engaging surface, a co-operating rotatable roll having a conicall rand-engaging sur` face,` means for rotating the rolls in opposite directions, and a gage associated with said rolls' and provided with liftand rand-contact-surfaces lying in different planes, the work-engaging .portion of maximum diameter of the rand-roll Aextending beyond-the plane of the lift-contact surface ofthe gage into proximity with the randcontact-surface.

14. An apparatus for assembling heel-lifts andV rands comprising a rotatable roll having a conical lift-engaging surface, a co-operating rotatable roll having a conical rand-engaging surface, means for rotating the rolls in opposite directions, and a gage associated with said rolls and provided with liftand rand-contactsurfaces lying in diiferentplanes, Vthe rand-contact-surface of the gage being farther from the center Vof the lift than is the lift-contact-surface, the workengaging portion of maximum diameter of the rand-roll extending beyond the plane of the liftcontact-surface of the gage'into proximity with the rand-contact-Vsurface. Y

15. An apparatus for assembling heel-lifts and rands comprising co-operating rotatable rolls having respectively conical liftand rand-engaging surfaces, means for rotating the rolls in opposite directions, and a gage associated with Vthe rolls, one of said rolls being provided.V upon its work-engaging surface with projections inof rotation from the portion of the roll of smaller diameter toward the larger portion.

` 16. An apparatus for assembling heel-lifts and rands comprising co-operating rotatable rolls having respectively lifand rand-engaging surfaces, means for rotating the rolls in opposite directions, and a gage associated with the rolls, the lift-roll being` provided with projections arranged to urge the work toward the gage.

1'7. An apparatus for assembling heel-lifts and rands comprising a gage, co-operating rotatable rolls having respectively conical liftand randengaging surfaces, and means for rotating the rolls in opposite directions, the lift-roll being provided with grooves extending between its extremities along its .Workeengaging surface and inclined rearwardly with respect to the direction of rotation from the portion of the roll of smaller diameter toward the largerportion.

18. An apparatus for assemblingheeldifts and rands comprising a gage co-operating rotatable rolls having respectively conical liftand randenga'gingsurfaces, and means for rotating the rolls in opposite directions, the lift-roll being provided with grooves extending between its extremities along its Work-engaging surface and inclined rearwardly with respect to the direction of rotation from the portion of the roll of smaller diameter toward the larger portion and circumferential grooves intersecting the inclined grooves.

19. An apparatus for assembling heel-lifts and rands comprising a rotatable roll having a conical lift-engaging surface, a co-operating rotatable roll having a conical rand-engaging surface, means arranged to. yieldably force one of the rolls toward the other, means for rotating the rolls in opposite directions, and a'lifts and randgage associated with said rolls.

r20. An apparatus for assembling heel-lifts and rands comprising a frame, an arm pivoted thereu on, a pair of conical lift and rand-engaging rolls Vrotatable in the frame and arm, and means acting upon the arm and arranged to force its roll yieldably toward the companion roll.

21. An apparatus for assembling heel-lifts and rands comprising a frame, an arm pivoted theren on, a pair of conical, liftand rand-engaging rolls `rotatable in the frame and arm, a variable stop forthe arm, a spring arranged to force the Cil arm. against the stop, and means arranged to vary the force of the spring.

22. An apparatus for assembling heel-lifts and fands comprising a frame, an arm pivoted thereon, a pail` of conical liftand rand-engagingl rolls rotatable in the frame and arm, and a movable gage having a Work-contacting surface curved about the pivotal axis of the arm.

23. An apparatus for assembling heel-lifts and 

